CN109560891A - Realize the method and device of wavelength-division-multiplexed optical signal branch - Google Patents
Realize the method and device of wavelength-division-multiplexed optical signal branch Download PDFInfo
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- CN109560891A CN109560891A CN201811368293.3A CN201811368293A CN109560891A CN 109560891 A CN109560891 A CN 109560891A CN 201811368293 A CN201811368293 A CN 201811368293A CN 109560891 A CN109560891 A CN 109560891A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04J—MULTIPLEX COMMUNICATION
- H04J14/00—Optical multiplex systems
- H04J14/02—Wavelength-division multiplex systems
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/10—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings of the optical waveguide type
- G02B6/12—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings of the optical waveguide type of the integrated circuit kind
- G02B6/12007—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings of the optical waveguide type of the integrated circuit kind forming wavelength selective elements, e.g. multiplexer, demultiplexer
- G02B6/12009—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings of the optical waveguide type of the integrated circuit kind forming wavelength selective elements, e.g. multiplexer, demultiplexer comprising arrayed waveguide grating [AWG] devices, i.e. with a phased array of waveguides
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/24—Coupling light guides
- G02B6/26—Optical coupling means
- G02B6/28—Optical coupling means having data bus means, i.e. plural waveguides interconnected and providing an inherently bidirectional system by mixing and splitting signals
- G02B6/293—Optical coupling means having data bus means, i.e. plural waveguides interconnected and providing an inherently bidirectional system by mixing and splitting signals with wavelength selective means
- G02B6/29304—Optical coupling means having data bus means, i.e. plural waveguides interconnected and providing an inherently bidirectional system by mixing and splitting signals with wavelength selective means operating by diffraction, e.g. grating
- G02B6/29316—Light guides comprising a diffractive element, e.g. grating in or on the light guide such that diffracted light is confined in the light guide
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04Q—SELECTING
- H04Q11/00—Selecting arrangements for multiplex systems
- H04Q11/0001—Selecting arrangements for multiplex systems using optical switching
- H04Q11/0062—Network aspects
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04Q—SELECTING
- H04Q11/00—Selecting arrangements for multiplex systems
- H04Q11/0001—Selecting arrangements for multiplex systems using optical switching
- H04Q11/0062—Network aspects
- H04Q2011/0079—Operation or maintenance aspects
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- Microelectronics & Electronic Packaging (AREA)
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Abstract
The invention discloses a kind of method and devices for realizing wavelength-division-multiplexed optical signal branch, are related to optical transport technology field, method includes the following steps: wavelength-division-multiplexed optical signal is carried out partial wave in distant-end node, the AAU signal for obtaining multichannel specific wavelength realizes branch.Photoelectric conversion and electro-optic conversion are successively carried out to the AAU signal per specific wavelength all the way, obtain the multichannel regeneration AAU signal within the scope of preset wavelength, the wherein quantity of the corresponding different wave length of multichannel regeneration AAU signal, less than the quantity of the corresponding different wave length of AAU signal of multichannel specific wavelength, the regenerated AAU signal of multichannel is sent in each AAU equipment.The present invention is not necessarily to parse/be packaged to wavelength-division-multiplexed optical signal, it is low to be delayed, and AAU equipment can support wavelength-division-multiplexed optical signal to transmit to avoid using the optical module of Wavelength tunable.
Description
Technical field
The present invention relates to optical transport technology fields, and in particular to a kind of method for realizing wavelength-division-multiplexed optical signal branch and dress
It sets.
Background technique
With the continuous development of Internet application, such as: big data, cloud computing, HD video etc., optical-fiber network evolution have walked
Enter the 5G epoch.The main feature that 5G network intends offer business includes big bandwidth, and low delay is connected with magnanimity, thus to bearer network
Especially move in terms of the bandwidth of forward pass network, capacity, delay and networking flexibility that more stringent requirements are proposed.Wherein, mobile
Forward pass network be responsible for connecting active antenna element (AAU, active antenna unit) and distribution unit (DU,
Distributed unit), there are mainly three types of bearing modes: 1) fiber direct connection；2) active exchange；3) passive wavelength-division.
Fiber direct connection scheme is directly connected to DU and AAU by optical fiber, and this method consumes a large amount of optical fiber, and optical fiber is advised
It draws, complex management, but cost is relatively low for optical module.Active exchange scheme is sent signal to the active friendship in distal end by trunk optical fiber
Node is changed, which is responsible for parsing/packetized signals, is then distributed to each AAU.The advantages of program is that consumption optical fiber is few, optical mode
Block cost is low, but distant-end node needs to power, and the parsing of signal can generate delay with exchanging.Passive wavelength division schemes use
Wavelength division multiplexer will first be sent to the signal multiplex of each AAU, and it is passive that multiplex signal is then sent to distal end by trunk optical fiber
Each wavelength signals are sent to its corresponding A AU again after passive wavelength-division device partial wave by wavelength-division device.Program advantage is delay
It is low, consumption optical fiber it is few, and far end device without power supply.But since each AAU corresponds to different wavelength, in AAU equipment
Need the optical module using Wavelength tunable.Current stage, the optical mode block cost of Wavelength tunable are much larger than the optical module of fixed wave length
Cost, main cause are the design and production more difficulty of tunable laser.
Three of the above based Carrying Scheme respectively has its application scenarios, to achieve the purpose that construction and maintenance overall cost are optimal.Example
Such as: in fiber resource situation abundant, being mainly considered as fiber direct connection scheme；Lack in fiber resource, but has power supply
Active exchange scheme can be used in the case where condition, such as: slice packet network.Lack in fiber resource and without item of powering
In the case where part, then passive wavelength division schemes are used, such as: Wave division multiplexing passive optical network.For second of application scenarios, it may be assumed that light
Fine resource shortage, but have the case where condition of power supply, using active exchange scheme, such as: slice packet network, one side cost compared with
Height is mainly reflected in the active switching equipment in distal end.On the other hand, active switching equipment needs parse/beat to AAU signal
Packet, increases delay and power consumption in this way.
Summary of the invention
In view of the deficiencies in the prior art, the purpose of the present invention is to provide a kind of realization wavelength-division-multiplexed optical signals point
The method on road, this method is in the case where fiber resource lacks but has condition of power supply, without carrying out to wavelength-division-multiplexed optical signal
Parsing/packing, delay it is low, and AAU equipment can to avoid supported using the optical module of Wavelength tunable wavelength-division-multiplexed optical signal divide
Road transmission.
To achieve the above objectives, the technical solution adopted by the present invention is that:
A method of realizing wavelength-division-multiplexed optical signal branch, method includes the following steps:
In distant-end node, wavelength-division-multiplexed optical signal is subjected to partial wave, the AAU signal for obtaining multichannel specific wavelength, which is realized, to be divided
Road；
Photoelectric conversion and electro-optic conversion are successively carried out to the AAU signal per specific wavelength all the way, obtain preset wavelength range
Interior multichannel regenerates AAU signal, and wherein the quantity of the corresponding different wave length of multichannel regeneration AAU signal, is less than multichannel specific wavelength
The corresponding different wave length of AAU signal quantity, the regenerated AAU signal of multichannel is sent in each AAU equipment.
Based on the above technical solution, wavelength-division-multiplexed optical signal is subjected to partial wave, obtains the AAU of multichannel specific wavelength
Signal, specific steps are as follows:
Wavelength-division-multiplexed optical signal is subjected to partial wave using wavelength division multiplexer, the wavelength division multiplexer is using support first band
The array waveguide grating AWG in channel and second band channel, and the wavelength division multiplexer includes a multiplex port and multiple points
Wave port, each corresponding first band channel in the partial wave port and a second band channel；
The wavelength-division-multiplexed optical signal that local side is received by multiplex port, carries out partial wave for wavelength-division-multiplexed optical signal, obtains more
The AAU signal of road first band or second band wavelength simultaneously realizes branch by multiple partial wave ports.
Based on the above technical solution, photoelectric conversion and electricity are successively carried out to the AAU signal per specific wavelength all the way
Light conversion, obtains the regenerated AAU signal of multichannel within the scope of preset wavelength, specific steps are as follows:
Using DWDM optical module corresponding with partial wave port number, the first band or the second wave of corresponding partial wave port are received
The AAU signal of Duan Bochang carries out photoelectric conversion, corresponding electric signal is obtained, wherein the data feedback channel wave of each DWDM optical module
Length is consistent with corresponding partial wave port channel wavelength with down going channel wavelength；
Using customer side optical module corresponding with DWDM optical mode number of blocks, the telecommunications in corresponding DWDM optical module is received
Number, and each customer side optical module carries out electro-optic conversion, converts electrical signals within the scope of third wave band preset wavelength
Regenerate AAU signal.
Based on the above technical solution, it is pre- to convert electrical signals to the same third wave band for each customer side optical module
If the regeneration AAU signal in wave-length coverage.
Based on the above technical solution, the third wave band is O wave band.
Based on the above technical solution,
The first band channel is C-band channel, and the second band channel is L-band channel；Or
The first band channel is L-band channel, and the second band channel is C-band channel.
Based on the above technical solution, photoelectric conversion and electricity are successively carried out to the AAU signal per specific wavelength all the way
When light is converted, by mode switch module between the DWDM optical module and customer side optical module, the input of signal and defeated is carried out
Out, the operating mode of the mode switch module includes transparent transmission mode and signal shaping mode；
When the mode switch module is under transparent transmission mode, the digital signal delivery outlet of the DWDM optical module passes through
High speed data lines are directly connected to the digital signal input ports of customer side optical module；The digital signal input ports of DWDM optical module are logical
High speed data lines are crossed, the digital signal delivery outlet of customer side optical module is directly connected to；
When the mode switch module is under signal shaping mode, down direction, the number of the DWDM optical module
Signal output connects CDR chip input port, and the digital signal that corresponding CDR chip delivery outlet reconnects customer side optical module is defeated
Entrance；The digital signal delivery outlet of up direction, the customer side optical module connects CDR chip input port, corresponding CDR chip
The digital signal input ports of delivery outlet reconnection DWDM optical module.
Based on the above technical solution, the operating mode of the mode switch module further includes data exchange mode,
The data exchange mode using M:N mode realize between M DWDM optical module and N number of customer side optical module the input of signal and
Output.
Based on the above technical solution, as M:N=1:N, down direction, the digital signal output of DWDM optical module
The input port of mouth connection data exchange chip simultaneously generates the road N output digit signals, and the output end of exchange chip connects N number of customer side
The digital input port of optical module；Up direction, the digital output port connection data exchange chip of N number of customer side optical module
Input port generates output digit signals all the way and connects the digital input port of DWDM optical module；
As M:N=M:1, down direction, the digital signal delivery outlet connection data exchange chip of M DWDM optical module
Input port, generates output digit signals all the way, and the number that the output end of data exchange chip connects a customer side optical module is defeated
Inbound port；Up direction, the input port of the digital output port connection exchange chip of customer side optical module, generates the output of the road M
Digital signal and the digital input port for connecting M DWDM optical module；
When M and N be 1 when, M DWDM optical module and N number of customer side optical module are grouped, make each group it is full
One DWDM optical module of foot corresponds to multiple customer side optical modules or the corresponding customer side optical module of multiple DWDM optical modules, presses
According to the situation of 1:N or M:1, outputting and inputting for signal is carried out with customer side optical module to the DWDM optical module in each group.
At the same time, it is another object of the present invention to provide a kind of device for realizing wavelength-division-multiplexed optical signal branch,
The device is in the case where fiber resource lacks but has condition of power supply, without parse/beat to wavelength-division-multiplexed optical signal
Wrap, be delayed it is low, and AAU equipment can to avoid supported using the optical module of Wavelength tunable wavelength-division-multiplexed optical signal branch transmit.
To achieve the above objectives, the technical solution adopted by the present invention is that:
A kind of device for realizing wavelength-division-multiplexed optical signal branch, comprising:
Wavelength division multiplexer is used to wavelength-division-multiplexed optical signal carrying out partial wave, and the AAU signal for obtaining multichannel specific wavelength is real
Existing branch；
Conversion module is used to successively carry out photoelectric conversion and electro-optic conversion to the AAU signal per specific wavelength all the way, obtain
Multichannel within the scope of to preset wavelength regenerates AAU signal, and wherein the quantity of the corresponding different wave length of multichannel regeneration AAU signal, few
In the quantity of the corresponding different wave length of AAU signal of multichannel specific wavelength；And the regenerated AAU signal of multichannel is sent to each set
In the AAU equipment for the optical module for having wavelength fixed.
Based on the above technical solution, wavelength-division-multiplexed optical signal is carried out partial wave by the wavelength division multiplexer, is obtained more
The AAU signal of road specific wavelength, detailed process are as follows:
The wavelength division multiplexer is using the wave band array waveguide grating for supporting first band channel and second band channel
AWG, and the wavelength division multiplexer includes a multiplex port and multiple partial wave ports, corresponding one of each partial wave port the
One waveband channels and a second band channel；
The wavelength-division-multiplexed optical signal that local side is received by multiplex port, carries out partial wave for wavelength-division-multiplexed optical signal, obtains more
The AAU signal of road first band or second band wavelength simultaneously realizes branch by multiple partial wave ports.
Based on the above technical solution, the conversion module includes DWDM optical mode corresponding with partial wave port number
Block and customer side optical module；Photoelectric conversion and electro-optic conversion are successively carried out to the AAU signal per specific wavelength all the way, preset
The regenerated AAU signal of multichannel in wave-length coverage, detailed process are as follows:
Using DWDM optical module corresponding with partial wave port number, the first band or the second wave of corresponding partial wave port are received
The AAU signal of Duan Bochang carries out photoelectric conversion, corresponding electric signal is obtained, wherein the data feedback channel wave of each DWDM optical module
Length is consistent with corresponding partial wave port channel wavelength with down going channel wavelength；
Using customer side optical module corresponding with DWDM optical mode number of blocks, the telecommunications in corresponding DWDM optical module is received
Number, and each customer side optical module converts electrical signals to the regeneration AAU signal within the scope of third wave band preset wavelength.
Based on the above technical solution, each customer side optical module converts electrical signals to the same third wave
Regeneration AAU signal within the scope of section preset wavelength.
Based on the above technical solution, the third wave band is O wave band.
Based on the above technical solution,
The first band channel is C-band channel, and the second band channel is L-band channel；Or
The first band channel is L-band channel, and the second band channel is C-band channel.
Based on the above technical solution, the conversion module further includes mode switch module, the DWDM optical module
By mode switch module between customer side optical module, outputting and inputting for signal, the work of the mode switch module are carried out
Operation mode includes transparent transmission mode and signal shaping mode；
When the mode switch module is under transparent transmission mode, the digital signal delivery outlet of the DWDM optical module passes through
High speed data lines are directly connected to the digital signal input ports of customer side optical module；The digital signal input ports of DWDM optical module are logical
High speed data lines are crossed, the digital signal delivery outlet of customer side optical module is directly connected to；
When the mode switch module is under signal shaping mode, down direction, the number of the DWDM optical module
Signal output connects CDR chip input port, and the digital signal that corresponding CDR chip delivery outlet reconnects customer side optical module is defeated
Entrance；The digital signal delivery outlet of up direction, the customer side optical module connects CDR chip input port, corresponding CDR chip
The digital signal input ports of delivery outlet reconnection DWDM optical module.
Based on the above technical solution, the operating mode of the mode switch module further includes data exchange mode,
The data exchange mode using M:N mode realize between M DWDM optical module and N number of customer side optical module the input of signal and
Output.
Based on the above technical solution,
As M:N=1:N, the digital signal delivery outlet of down direction, DWDM optical module connects the defeated of data exchange chip
Entrance simultaneously generates the road N output digit signals, and the output end of exchange chip connects the digital input port of N number of customer side optical module；
Up direction, the input port of the digital output port connection data exchange chip of N number of customer side optical module, generation export all the way
Digital signal and the digital input port for connecting DWDM optical module；
As M:N=M:1, down direction, the digital signal delivery outlet connection data exchange chip of N number of DWDM optical module
Input port, generates output digit signals all the way, and the number that the output end of data exchange chip connects a customer side optical module is defeated
Inbound port；Up direction, the input port of the digital output port connection exchange chip of customer side optical module, generates the output of the road N
Digital signal and the digital input port for connecting N number of DWDM optical module；
When M and N be 1 when, M DWDM optical module and N number of customer side optical module are grouped, make each group it is full
One DWDM optical module of foot corresponds to multiple customer side optical modules or the corresponding customer side optical module of multiple DWDM optical modules, presses
According to the situation of 1:N or M:1, outputting and inputting for signal is carried out with customer side optical module to the DWDM optical module in each group.
Compared with the prior art, the advantages of the present invention are as follows:
(1) method of the realization wavelength-division-multiplexed optical signal branch in the present invention, due to relating merely to physical layer, it may be assumed that PMD
Layer (Physical media dependent, physical layer medium dependent), main operating procedure include: wavelength-division multiplex/
Demultiplexing, photoelectric conversion and electro-optic conversion conversion, so delay is substantially not present.The side of active exchange compared to the prior art
Formula is not related to the content of data frame analyzing, packing, since data frame analyzing, packing belong to TC Layer (Transmission
Control, transmission control layer), certain delay can be generated.Therefore the technical solution in the present invention be delayed compared with prior art it is low.
(2) method of the realization wavelength-division-multiplexed optical signal branch in the present invention, under conditions of having power supply, in the present embodiment
The AAU signal of the multichannel specific wavelength obtained after partial wave is successively subjected to photoelectric conversion and electro-optic conversion, to be preset
Multichannel in wave-length coverage regenerates AAU signal.As long as the wavelength of regeneration AAU signal is within a preset range, in each AAU equipment
Only needing to be arranged the fixed optical module of corresponding wavelength can be realized sending and receiving for AAU signal, and multichannel regeneration AAU letter
The quantity of number corresponding different wave length, less than the quantity of the corresponding different wave length of AAU signal of multichannel specific wavelength.It is best just
It is that multichannel regeneration AAU signal corresponds to the same wavelength, can be fixed using unified wavelength in AAU equipment all in this way
Optical module.The mode of passive wavelength-division is compared in the prior art, is avoided the optical module using Wavelength tunable, is greatly reduced into
This.
Detailed description of the invention
Fig. 1 is the frame diagram that the device of wavelength-division-multiplexed optical signal branch is realized in the embodiment of the present invention；
Fig. 2 is that the wavelength of wavelength-division-multiplexed optical signal transmission in the embodiment of the present invention plans schematic diagram；
Fig. 3 is the schematic diagram in the embodiment of the present invention under transparent transmission mode；
Fig. 4 is the schematic diagram in the embodiment of the present invention under signal shaping mode；
Schematic diagram when Fig. 5 is 1:N and M:1 in the embodiment of the present invention；
Fig. 6 is the schematic diagram that 1:N and M:1 mode is used in mixed way in the embodiment of the present invention.
Specific embodiment
Invention is further described in detail with reference to the accompanying drawings and embodiments.
Embodiment 1:
It is shown in Figure 1, the present embodiment provides a kind of method for realizing wavelength-division-multiplexed optical signal branch, this method include with
Lower step:
In distant-end node, wavelength-division-multiplexed optical signal is subjected to partial wave, the AAU signal for obtaining multichannel specific wavelength, which is realized, to be divided
Road；
Photoelectric conversion and electro-optic conversion are successively carried out to the AAU signal per specific wavelength all the way, obtain preset wavelength range
Interior multichannel regenerates AAU signal, and wherein the quantity of the corresponding different wave length of multichannel regeneration AAU signal, is less than multichannel specific wavelength
The corresponding different wave length of AAU signal quantity, the regenerated AAU signal of multichannel is sent in each AAU equipment.
Specifically, be directed to down direction, the wavelength-division-multiplexed optical signal in the present embodiment is in local side by different wave length
AAU signal carries out obtained from multiplex.
In the present embodiment, due to relating merely to physical layer, it may be assumed that PMD Layer, main operating procedure include: wavelength-division
Multiplex/demultiplex, photoelectric conversion and electro-optic conversion conversion, so delay is substantially not present.Active exchange compared to the prior art
Mode, be not related to the content of data frame analyzing, packing, due to data frame analyzing, be packaged and belong to TC Layer, can generate certain
Delay.Therefore the technical solution in the present embodiment be delayed compared with prior art it is low.
In addition, under conditions of having power supply, in the present embodiment by the AAU signal of the multichannel specific wavelength obtained after partial wave according to
Secondary progress photoelectric conversion and electro-optic conversion, to obtain the multichannel regeneration AAU signal within the scope of preset wavelength.As long as regeneration
The wavelength of AAU signal within a preset range, only needs to be arranged in each AAU equipment the fixed optical module of corresponding wavelength
Realize sending and receiving for AAU signal, and the quantity of the corresponding different wave length of multichannel regeneration AAU signal, it is specific less than multichannel
The quantity of the corresponding different wave length of AAU signal of wavelength.Best is exactly that multichannel regeneration AAU signal corresponds to the same wavelength, this
The optical module that can be fixed using unified wavelength in all AAU equipment of sample.The mode of passive wavelength-division in the prior art
It compares, avoids the optical module using Wavelength tunable, greatly reduce cost.
Embodiment 2:
As a kind of preferable embodiment, on the basis of embodiment 1, wavelength-division-multiplexed optical signal is subjected to partial wave, is obtained
To the AAU signal of multichannel specific wavelength, specific steps are as follows:
Wavelength-division-multiplexed optical signal is subjected to partial wave using wavelength division multiplexer, the wavelength division multiplexer is using support first band
The array waveguide grating AWG in channel and second band channel, and the wavelength division multiplexer includes a multiplex port and multiple points
Wave port, each corresponding first band channel in the partial wave port and a second band channel；
The wavelength-division-multiplexed optical signal that local side is received by multiplex port, carries out partial wave for wavelength-division-multiplexed optical signal, obtains more
The AAU signal of road first band or second band wavelength simultaneously realizes branch by multiple partial wave ports.
Further, photoelectric conversion and electro-optic conversion are successively carried out to the AAU signal per specific wavelength all the way, is preset
The regenerated AAU signal of multichannel in wave-length coverage, specific steps are as follows:
Using DWDM optical module corresponding with partial wave port number, the first band or the second wave of corresponding partial wave port are received
The AAU signal of Duan Bochang carries out photoelectric conversion, corresponding electric signal is obtained, wherein the data feedback channel wave of each DWDM optical module
Length is consistent with corresponding partial wave port channel wavelength with down going channel wavelength；
Using customer side optical module corresponding with DWDM optical mode number of blocks, the telecommunications in corresponding DWDM optical module is received
Number, and each customer side optical module carries out electro-optic conversion, converts electrical signals within the scope of third wave band preset wavelength
Regenerate AAU signal.
Further, the first band channel is C-band channel, and the second band channel is L-band channel；Or
The first band channel is L-band channel, and the second band channel is C-band channel.
Further, each customer side optical module converts electrical signals within the scope of the same third wave band preset wavelength
Regenerate AAU signal.Preferably, the third wave band is O wave band.
Specifically, the used wavelength division multiplexer in the present embodiment, using C+L wave band array waveguide grating AWG
(Arrayed Waveguide Gratings), wavelength interval 100GHz.It is logical that each partial wave port respectively corresponds a C-band
Road and a L-band channel.Believe to carry uplink AAU signal, L-band channel to bearing downlink AAU in C-band channel
Number, or it is opposite.DWDM (dense wave division multipurpose, Dense Wavelength Division Multiplexed) optical module
Optical port uses single fiber bi-directional, connects the partial wave port of wavelength division multiplexer.The data feedback channel wavelength of each DWDM optical module is under
Row of channels wavelength is consistent with the partial wave port wavelength of connected wavelength division multiplexer.The uplink AAU signal and downlink AAU in each channel are believed
Number be 25Ge CPRI (Common Public Radio Interface) signal.Customer side optical module then can be using low cost
CWDM (Coarse Wavelength Division Multiplexing) wavelength or LAN-WDM (Local Area
Network Wavelength Division Multiplexing) wavelength 25-Gbps SFP BiDi module.
It is shown in Figure 2, for the wavelength planning of wavelength-division-multiplexed optical signal transmission.A L is added with a C-band channel
Waveband channels are a pair of channels, to support the uplink and downlink transfer of wavelength-division-multiplexed optical signal all the way.Specifically, with 100GHz
For channel spacing, C-band and L-band respectively include 40 channels, and according to the sequence of wavelength from low to high, 40 of C-band are logical
Road can be classified as: C1, C2 ..., C40；40 channels of L-band can be classified as: L1, L2 ..., L40, then channel is to #1
{ C1, L1 }；Channel is { C2, L2 } to #2；And so on.DWDM optical module #1 connects road to #1, therefore DWDM optical module #1
Upstream wavelength is C1, downstream wavelength L1；Or upstream wavelength is L1, downstream wavelength C1.Here, DWDM optical module is using single
Fine two-way optical port form is attached with partial wave port.
When utilizing the method in the present embodiment, specifically, being directed to down direction, wavelength-division multiplex method is used in local side
AAU signal is subjected to multiplex, wherein each AAU signal corresponds to specified wavelength.In distant-end node, wavelength-division demultiplexing side is used first
Wavelength-division multiplex AAU signal is carried out partial wave by method；After photoelectric conversion (O/E convention), then pass through electro-optic conversion (E/O
Convention the regenerated AAU signal of multichannel) is generated；AAU signal wavelength corresponding to first order photoelectric conversion is Ci or Li, is belonged to
C or L-band, subscript i indicate the channel number of C or L-band.Regenerated AAU signal wavelength corresponding to the electro-optic conversion of the second level
For Oi, belong to O wave band.Particularly, all regeneration AAU signals can share the same O wave band preset wavelength range.
As inverse process, for up direction, it is Oi that AAU, which sends wavelength of optical signal, belongs to O wave band.Particularly, own
AAU, which sends optical signal, can share the same O wave band preset wavelength range.In distant-end node, AAU signal passes through photoelectric conversion
After (O/E convention), then pass through electro-optic conversion (E/O convention) generation regenerated AAU signal of multichannel；The first order
AAU signal wavelength corresponding to photoelectric conversion is Oi, and regenerated AAU signal wavelength corresponding to the electro-optic conversion of the second level is Ci or Li,
Belong to C or L-band, subscript i indicates the channel number of C or L-band.The above regenerated AAU signal wavelength is different, respectively corresponds
Each port wavelength of wavelength division multiplexer.Regenerated AAU signal is subjected to multiplex through wavelength division multiplexer, is last transmitted to local side.
Typically, the wave-length coverage of O wave band is 1260nm-1360nm, in the present embodiment, converts electrical signals to and is located at
Regeneration AAU signal within the scope of O wave band preset wavelength, for example can be on the basis of 1310nm, it is contemplated that actually have one
The deviation range of a positive and negative 10nm, this is acceptable.That is, regeneration AAU signal all 1300~1320nm this
The optical signal that a range is capable of the realization O wave band of low cost sends and receives, to realize the purpose for reducing cost.
Preferably, each customer side optical module converts electrical signals to the regeneration within the scope of the same O wave band preset wavelength
AAU signal, for example be all this range of 1300~1320nm.I.e. customer side optical module uses same specification, the uplink supported
Wavelength is identical, downstream wavelength is identical, in O wave band, the optical mode block cost between the side AAU and DU is greatly reduced, facilitates deployment.
Embodiment 3:
As a kind of preferable embodiment, on the basis of embodiment 2, to the AAU signal per specific wavelength all the way according to
When secondary progress photoelectric conversion and electro-optic conversion, pass through mode switch module between the DWDM optical module and customer side optical module,
Outputting and inputting for signal is carried out, the operating mode of the mode switch module includes transparent transmission mode and signal shaping mode.
It is shown in Figure 3, when the mode switch module is under transparent transmission mode, the number letter of the DWDM optical module
Number delivery outlet is directly connected to the digital signal input ports of customer side optical module by high speed data lines；The number of DWDM optical module
Signal input is directly connected to the digital signal delivery outlet of customer side optical module by high speed data lines.
It is shown in Figure 4, when the mode switch module is under signal shaping mode, down direction, the DWDM
The digital signal delivery outlet of optical module connects CDR (Clock Data Recovery, clock and data recovery) chip input port, right
The CDR chip delivery outlet answered reconnects the digital signal input ports of customer side optical module；Up direction, the customer side optical module
Digital signal delivery outlet connect CDR chip input port, corresponding CDR chip delivery outlet reconnects the number letter of DWDM optical module
Number input port.
The meaning of mode switch module is that DWDM optical module and customer side optical module can be changed according to actual needs
Between connection type can use transparent transmission mode in the preferable situation of link circuit condition.Signal shaping mode is then for length
Distance Transmission, comes to be lost larger from OLT (optical line terminal, optical line terminal), and signal quality is bad, needs
It is retransmited after wanting CDR chip to carry out shaping.
Embodiment 4:
It is shown in Figure 5, as a kind of preferable embodiment, on the basis of embodiment 3, the mode switch module
Operating mode further include data exchange mode, the data exchange mode realizes M DWDM optical module and N using M:N mode
Signal outputs and inputs between a customer side optical module.
Specifically, the digital signal delivery outlet of down direction, DWDM optical module connects data exchange as M:N=1:N
The input port of chip simultaneously generates the road N output digit signals, and the number that the output end of exchange chip connects N number of customer side optical module is defeated
Inbound port；Up direction, the input port of the digital output port connection data exchange chip of N number of customer side optical module, generates
Output digit signals and connect the digital input port of DWDM optical module all the way.Using 1:N mode, it is primarily due to when DWDM light
When module side data throughout is greater than single customer side optical module data throughout, need the data exchange chip of 1:N by DWDM
The convergence data of optical module side are split as multiple customer side optical module data.
As M:N=M:1, down direction, the digital signal delivery outlet connection data exchange chip of M DWDM optical module
Input port, generates output digit signals all the way, and the number that the output end of data exchange chip connects a customer side optical module is defeated
Inbound port；Up direction, the input port of the digital output port connection exchange chip of customer side optical module, generates the output of the road M
Digital signal and the digital input port for connecting M DWDM optical module.Using N:1 mode, it is primarily due to when DWDM optical module
When side data handling capacity is less than single customer side optical module data throughout, need the data exchange chip of N:1 by multiple DWDM
The data convergence of optical module side is a customer side optical module data.
When M and N be 1 when, M DWDM optical module and N number of customer side optical module are grouped, make each group it is full
One DWDM optical module of foot corresponds to multiple customer side optical modules or the corresponding customer side optical module of multiple DWDM optical modules, presses
According to the situation of 1:N or M:1, outputting and inputting for signal is carried out with customer side optical module to the DWDM optical module in each group.It is right
In M DWDM optical module and N number of customer side optical module, DWDM optical module and visitor inside multiple groups, each group can be divided into
Family sidelight module number ratio is not to meet 1:Ap, exactly meet Bq: 1, wherein p and q indicates the group number under both situations, p and q
The sum of be less than equal in M and N it is lesser that.Such as M be equal to 5, N be equal to 4 when, 1:1,1:2 and 3 can be divided into:
1, this 3 groups.
Embodiment 5:
The present embodiment provides a kind of devices for realizing wavelength-division-multiplexed optical signal branch, including wavelength division multiplexer and modulus of conversion
Block.
Wherein, wavelength division multiplexer is used to wavelength-division-multiplexed optical signal carrying out partial wave, obtains the AAU of multichannel specific wavelength
Signal realizes branch；
Conversion module is used to successively carry out photoelectric conversion and electro-optic conversion to the AAU signal per specific wavelength all the way, obtain
Multichannel within the scope of to preset wavelength regenerates AAU signal, and wherein the quantity of the corresponding different wave length of multichannel regeneration AAU signal, few
In the quantity of the corresponding different wave length of AAU signal of multichannel specific wavelength；And the regenerated AAU signal of multichannel is sent to each set
In the AAU equipment for the optical module for having wavelength fixed.
Embodiment 6:
As a kind of preferable embodiment, on the basis of embodiment 5, the wavelength division multiplexer believes wavelength division multiplexed light
Number carry out partial wave, obtain the AAU signal of multichannel specific wavelength, detailed process are as follows:
The wavelength division multiplexer is using the wave band array waveguide grating for supporting first band channel and second band channel
AWG, and the wavelength division multiplexer includes a multiplex port and multiple partial wave ports, corresponding one of each partial wave port the
One waveband channels and a second band channel；
The wavelength-division-multiplexed optical signal that local side is received by multiplex port, carries out partial wave for wavelength-division-multiplexed optical signal, obtains more
The AAU signal of road first band or second band wavelength simultaneously realizes branch by multiple partial wave ports.
Further, the conversion module includes DWDM optical module corresponding with partial wave port number and customer side optical mode
Block；Photoelectric conversion and electro-optic conversion are successively carried out to the AAU signal per specific wavelength all the way, obtained more within the scope of preset wavelength
The regenerated AAU signal in road, detailed process are as follows:
Using DWDM optical module corresponding with partial wave port number, the first band or the second wave of corresponding partial wave port are received
The AAU signal of Duan Bochang carries out photoelectric conversion, corresponding electric signal is obtained, wherein the data feedback channel wave of each DWDM optical module
Length is consistent with corresponding partial wave port channel wavelength with down going channel wavelength；
Using customer side optical module corresponding with DWDM optical mode number of blocks, the telecommunications in corresponding DWDM optical module is received
Number, and each customer side optical module converts electrical signals to the regeneration AAU signal within the scope of third wave band preset wavelength.
Further, the first band channel is C-band channel, and the second band channel is L-band channel；Or
The first band channel is L-band channel, and the second band channel is C-band channel.
Further, each customer side optical module converts electrical signals within the scope of the same third wave band preset wavelength
Regenerate AAU signal.Preferably, the third wave band is O wave band.
Embodiment 7:
As a kind of preferable embodiment, on the basis of embodiment 6, the conversion module further includes pattern switching mould
Block carries out outputting and inputting for signal by mode switch module between the DWDM optical module and customer side optical module, described
The operating mode of mode switch module includes transparent transmission mode and signal shaping mode；
When the mode switch module is under transparent transmission mode, the digital signal delivery outlet of the DWDM optical module passes through
High speed data lines are directly connected to the digital signal input ports of customer side optical module；The digital signal input ports of DWDM optical module are logical
High speed data lines are crossed, the digital signal delivery outlet of customer side optical module is directly connected to；
When the mode switch module is under signal shaping mode, down direction, the number of the DWDM optical module
Signal output connects CDR chip input port, and the digital signal that corresponding CDR chip delivery outlet reconnects customer side optical module is defeated
Entrance；The digital signal delivery outlet of up direction, the customer side optical module connects CDR chip input port, corresponding CDR chip
The digital signal input ports of delivery outlet reconnection DWDM optical module.
Embodiment 8:
It is shown in Figure 5, as a kind of preferable embodiment, on the basis of embodiment 7, the mode switch module
Operating mode further include data exchange mode, the data exchange mode realizes M DWDM optical module and N using M:N mode
Signal outputs and inputs between a customer side optical module.
Specifically, the digital signal delivery outlet of down direction, DWDM optical module connects data exchange as M:N=1:N
The input port of chip simultaneously generates the road N output digit signals, and the number that the output end of exchange chip connects N number of customer side optical module is defeated
Inbound port；Up direction, the input port of the digital output port connection data exchange chip of N number of customer side optical module, generates
Output digit signals and connect the digital input port of DWDM optical module all the way.
As M:N=M:1, down direction, the digital signal delivery outlet connection data exchange chip of M DWDM optical module
Input port, generates output digit signals all the way, and the number that the output end of data exchange chip connects a customer side optical module is defeated
Inbound port；Up direction, the input port of the digital output port connection exchange chip of customer side optical module, generates the output of the road M
Digital signal and the digital input port for connecting M DWDM optical module.
When M and N be 1 when, M DWDM optical module and N number of customer side optical module are grouped, make each group it is full
One DWDM optical module of foot corresponds to multiple customer side optical modules or the corresponding customer side optical module of multiple DWDM optical modules, presses
According to the situation of 1:N or M:1, outputting and inputting for signal is carried out with customer side optical module to the DWDM optical module in each group.
The present invention is not limited to the above-described embodiments, for those skilled in the art, is not departing from
Under the premise of the principle of the invention, several improvements and modifications can also be made, these improvements and modifications are also considered as protection of the invention
Within the scope of.The content being not described in detail in this specification belongs to the prior art well known to professional and technical personnel in the field.
Claims (18)
1. a kind of method for realizing wavelength-division-multiplexed optical signal branch, which is characterized in that method includes the following steps:
In distant-end node, wavelength-division-multiplexed optical signal is subjected to partial wave, the AAU signal for obtaining multichannel specific wavelength realizes branch；
Photoelectric conversion and electro-optic conversion are successively carried out to the AAU signal per specific wavelength all the way, obtained within the scope of preset wavelength
Multichannel regenerates AAU signal, wherein the quantity of the corresponding different wave length of multichannel regeneration AAU signal, less than the AAU of multichannel specific wavelength
The regenerated AAU signal of multichannel is sent in each AAU equipment by the quantity of the corresponding different wave length of signal.
2. realizing the method for wavelength-division-multiplexed optical signal branch as described in claim 1, which is characterized in that believe wavelength division multiplexed light
Number carry out partial wave, obtain the AAU signal of multichannel specific wavelength, specific steps are as follows:
Wavelength-division-multiplexed optical signal is subjected to partial wave using wavelength division multiplexer, the wavelength division multiplexer is using support first band channel
With the array waveguide grating AWG in second band channel, and the wavelength division multiplexer include a multiplex port and multiple partial wave ends
Mouthful, each corresponding first band channel in the partial wave port and a second band channel；
The wavelength-division-multiplexed optical signal that local side is received by multiplex port, carries out partial wave for wavelength-division-multiplexed optical signal, obtains multichannel the
The AAU signal of one wave band or second band wavelength simultaneously realizes branch by multiple partial wave ports.
3. realizing the method for wavelength-division-multiplexed optical signal branch as claimed in claim 2, which is characterized in that per certain wave all the way
Long AAU signal successively carries out photoelectric conversion and electro-optic conversion, obtains the regenerated AAU signal of multichannel within the scope of preset wavelength,
Specific steps are as follows:
Using DWDM optical module corresponding with partial wave port number, the first band or second band wave of corresponding partial wave port are received
Long AAU signal, carry out photoelectric conversion, obtain corresponding electric signal, wherein the data feedback channel wavelength of each DWDM optical module with
Down going channel wavelength is consistent with corresponding partial wave port channel wavelength；
Using customer side optical module corresponding with DWDM optical mode number of blocks, the electric signal in corresponding DWDM optical module is received, and
Each customer side optical module carries out electro-optic conversion, converts electrical signals to the regeneration within the scope of third wave band preset wavelength
AAU signal.
4. realizing the method for wavelength-division-multiplexed optical signal branch as claimed in claim 3, it is characterised in that: each customer side optical mode
Block converts electrical signals to the regeneration AAU signal within the scope of the same third wave band preset wavelength.
5. the method for realization wavelength-division-multiplexed optical signal branch as described in claim 3 or 4, it is characterised in that: the third wave
Section is O wave band.
6. realizing the method for wavelength-division-multiplexed optical signal branch as claimed in claim 2, it is characterised in that:
The first band channel is C-band channel, and the second band channel is L-band channel；Or
The first band channel is L-band channel, and the second band channel is C-band channel.
7. realizing the method for wavelength-division-multiplexed optical signal branch as claimed in claim 3, which is characterized in that per certain wave all the way
When long AAU signal successively carries out photoelectric conversion and electro-optic conversion, pass through between the DWDM optical module and customer side optical module
Mode switch module, carries out outputting and inputting for signal, and the operating mode of the mode switch module includes transparent transmission mode and letter
Number plastic model；
When the mode switch module is under transparent transmission mode, the digital signal delivery outlet of the DWDM optical module passes through high speed
Data line is directly connected to the digital signal input ports of customer side optical module；The digital signal input ports of DWDM optical module pass through height
Fast data line is directly connected to the digital signal delivery outlet of customer side optical module；
When the mode switch module is under signal shaping mode, down direction, the digital signal of the DWDM optical module
Delivery outlet connects CDR chip input port, and corresponding CDR chip delivery outlet reconnects the digital signal input of customer side optical module
Mouthful；The digital signal delivery outlet of up direction, the customer side optical module connects CDR chip input port, and corresponding CDR chip is defeated
Outlet reconnects the digital signal input ports of DWDM optical module.
8. realizing the method for wavelength-division-multiplexed optical signal branch as claimed in claim 7, which is characterized in that the pattern switching mould
The operating mode of block further includes data exchange mode, the data exchange mode using M:N mode realize M DWDM optical module and
Signal outputs and inputs between N number of customer side optical module.
9. realizing the method for wavelength-division-multiplexed optical signal branch as claimed in claim 8, which is characterized in that
As M:N=1:N, down direction, the input port of the digital signal delivery outlet connection data exchange chip of DWDM optical module
And the road N output digit signals are generated, the output end of exchange chip connects the digital input port of N number of customer side optical module；Uplink
Direction, the input port of the digital output port connection data exchange chip of N number of customer side optical module, generates output number all the way
Signal and the digital input port for connecting DWDM optical module；
As M:N=M:1, down direction, the input of the digital signal delivery outlet connection data exchange chip of M DWDM optical module
Mouthful, output digit signals all the way are generated, the output end of data exchange chip connects the digital input end of a customer side optical module
Mouthful；Up direction, the input port of the digital output port connection exchange chip of customer side optical module, generates the road M output number
Signal and the digital input port for connecting M DWDM optical module；
When M and N are not 1, M DWDM optical module and N number of customer side optical module are grouped, make each group to be all satisfied one
A DWDM optical module corresponds to multiple customer side optical modules or the corresponding customer side optical module of multiple DWDM optical modules, according to 1:N
Or the situation of M:1, outputting and inputting for signal is carried out with customer side optical module to the DWDM optical module in each group.
10. a kind of device for realizing wavelength-division-multiplexed optical signal branch characterized by comprising
Wavelength division multiplexer is used to wavelength-division-multiplexed optical signal carrying out partial wave, and the AAU signal for obtaining multichannel specific wavelength, which is realized, to be divided
Road；
Conversion module is used to successively carry out photoelectric conversion and electro-optic conversion to the AAU signal per specific wavelength all the way, obtain pre-
If the multichannel in wave-length coverage regenerates AAU signal, wherein the quantity of the corresponding different wave length of multichannel regeneration AAU signal, is less than more
The quantity of the corresponding different wave length of AAU signal of road specific wavelength；And the regenerated AAU signal of multichannel is sent to each equipped with wave
In the AAU equipment of long fixed optical module.
11. realizing the device of wavelength-division-multiplexed optical signal branch as claimed in claim 10, which is characterized in that the wavelength-division multiplex
Wavelength-division-multiplexed optical signal is carried out partial wave by device, obtains the AAU signal of multichannel specific wavelength, detailed process are as follows:
The wavelength division multiplexer uses the wave band array waveguide grating AWG for supporting first band channel and second band channel, and
The wavelength division multiplexer includes a multiplex port and multiple partial wave ports, each corresponding first band in the partial wave port
Channel and a second band channel；
The wavelength-division-multiplexed optical signal that local side is received by multiplex port, carries out partial wave for wavelength-division-multiplexed optical signal, obtains multichannel the
The AAU signal of one wave band or second band wavelength simultaneously realizes branch by multiple partial wave ports.
12. realizing the device of wavelength-division-multiplexed optical signal branch as claimed in claim 11, which is characterized in that the conversion module
Including DWDM optical module corresponding with partial wave port number and customer side optical module；To the AAU signal per specific wavelength all the way
Photoelectric conversion and electro-optic conversion are successively carried out, the regenerated AAU signal of multichannel within the scope of preset wavelength, detailed process are obtained are as follows:
Using DWDM optical module corresponding with partial wave port number, the first band or second band wave of corresponding partial wave port are received
Long AAU signal, carry out photoelectric conversion, obtain corresponding electric signal, wherein the data feedback channel wavelength of each DWDM optical module with
Down going channel wavelength is consistent with corresponding partial wave port channel wavelength；
Using customer side optical module corresponding with DWDM optical mode number of blocks, the electric signal in corresponding DWDM optical module is received, and
Each customer side optical module converts electrical signals to the regeneration AAU signal within the scope of third wave band preset wavelength.
13. realizing the device of wavelength-division-multiplexed optical signal branch as claimed in claim 12, it is characterised in that: each client
Sidelight module converts electrical signals to the regeneration AAU signal within the scope of the same third wave band preset wavelength.
14. the device as described in claim 12 or 13 for realizing wavelength-division-multiplexed optical signal branch, it is characterised in that: the third
Wave band is O wave band.
15. realizing the device of wavelength-division-multiplexed optical signal branch as claimed in claim 11, it is characterised in that:
The first band channel is C-band channel, and the second band channel is L-band channel；Or
The first band channel is L-band channel, and the second band channel is C-band channel.
16. realizing the device of wavelength-division-multiplexed optical signal branch as claimed in claim 12, which is characterized in that the conversion module
Further include mode switch module, by mode switch module between the DWDM optical module and customer side optical module, carries out signal
Output and input, the operating mode of the mode switch module includes transparent transmission mode and signal shaping mode；
When the mode switch module is under transparent transmission mode, the digital signal delivery outlet of the DWDM optical module passes through high speed
Data line is directly connected to the digital signal input ports of customer side optical module；The digital signal input ports of DWDM optical module pass through height
Fast data line is directly connected to the digital signal delivery outlet of customer side optical module；
When the mode switch module is under signal shaping mode, down direction, the digital signal of the DWDM optical module
Delivery outlet connects CDR chip input port, and corresponding CDR chip delivery outlet reconnects the digital signal input of customer side optical module
Mouthful；The digital signal delivery outlet of up direction, the customer side optical module connects CDR chip input port, and corresponding CDR chip is defeated
Outlet reconnects the digital signal input ports of DWDM optical module.
17. realizing the device of wavelength-division-multiplexed optical signal branch as claimed in claim 16, which is characterized in that the pattern switching
The operating mode of module further includes data exchange mode, and the data exchange mode realizes M DWDM optical module using M:N mode
Signal outputs and inputs between N number of customer side optical module.
18. realizing the device of wavelength-division-multiplexed optical signal branch as claimed in claim 17, which is characterized in that
As M:N=1:N, down direction, the input port of the digital signal delivery outlet connection data exchange chip of DWDM optical module
And the road N output digit signals are generated, the output end of exchange chip connects the digital input port of N number of customer side optical module；Uplink
Direction, the input port of the digital output port connection data exchange chip of N number of customer side optical module, generates output number all the way
Signal and the digital input port for connecting DWDM optical module；
As M:N=M:1, down direction, the input of the digital signal delivery outlet connection data exchange chip of N number of DWDM optical module
Mouthful, output digit signals all the way are generated, the output end of data exchange chip connects the digital input end of a customer side optical module
Mouthful；Up direction, the input port of the digital output port connection exchange chip of customer side optical module, generates the road N output number
Signal and the digital input port for connecting N number of DWDM optical module；
When M and N are not 1, M DWDM optical module and N number of customer side optical module are grouped, make each group to be all satisfied one
A DWDM optical module corresponds to multiple customer side optical modules or the corresponding customer side optical module of multiple DWDM optical modules, according to 1:N
Or the situation of M:1, outputting and inputting for signal is carried out with customer side optical module to the DWDM optical module in each group.
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